Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data
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Aad, G., Abbott, B., Abdallah, J. et al. Electron and photon energy calibration with the ATLAS detector using LHC Run 1 data. Eur. Phys. J. C 74, 3071 (2014). [https://doi.org/10.1140/epjc/s10052-014-3071-4]
SponsorshipANPCyT; YerPhI, Armenia; Australian Research Council; BMWF, Austria; Austrian Science Fund (FWF); Azerbaijan National Academy of Sciences (ANAS); SSTC, Belarus; National Council for Scientific and Technological Development (CNPq); Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP); Natural Sciences and Engineering Research Council of Canada; NRC, Canada; Canada Foundation for Innovation; CERN; Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT); Chinese Academy of Sciences; Ministry of Science and Technology, China; National Natural Science Foundation of China; Departamento Administrativo de Ciencia, Tecnologia e Innovacion Colciencias; Ministry of Education, Youth & Sports - Czech Republic Czech Republic Government; DNRF, Denmark; Danish Natural Science Research Council; Lundbeckfonden; EPLANET; European Research Council (ERC); NSRF; European Union (EU); Centre National de la Recherche Scientifique (CNRS); CEA-DSM/IRFU, France; GNSF, Georgia; Federal Ministry of Education & Research (BMBF); German Research Foundation (DFG); HGF, Germany; Max Planck Society; Alexander von Humboldt Foundation; Greek Ministry of Development-GSRT; NSRF, Greece; Israel Science Foundation; MINERVA, Israel; German-Israeli Foundation for Scientific Research and Development; ICORE, Israel; Benoziyo Center, Israel; Istituto Nazionale di Fisica Nucleare (INFN); Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT) Japan Society for the Promotion of Science; CNRST, Morocco; FOM (The Netherlands) Netherlands Government; Netherlands Organization for Scientific Research (NWO) Netherlands Government; BRF, Norway; RCN, Norway; Ministry of Science and Higher Education, Poland; NCN, Poland; GRICES, Portugal; Portuguese Foundation for Science and Technology; MNE/IFA, Romania; MES of Russia; Russian Federation; JINR; MSTD, Serbia; MSSR, Slovakia; Slovenian Research Agency - Slovenia; MIZS, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC, Sweden; Wallenberg Foundation, Sweden; SER, Switzerland; Swiss National Science Foundation (SNSF); Cantons of Bern and Geneva, Switzerland; National Science Council of Taiwan; Ministry of Energy & Natural Resources - Turkey; Royal Society of London; Leverhulme Trust; United States Department of Energy (DOE); National Science Foundation (NSF); ICREA; Science & Technology Facilities Council (STFC) ST/H00095X/1 ST/I006056/1 ST/K001310/1 ATLAS Upgrades ST/K001361/1 ATLAS Upgrades ST/K003437/1 GRIDPP ST/I000178/1 ST/I005803/1 ST/J004928/1 ST/K00073X/1 ST/K001329/1 ATLAS ST/K00140X/1 ATLAS ST/L003112/1 ST/I006056/1 ATLAS Upgrades ST/K003437/1 PP/E002757/1 ST/G502320/1 ST/H001069/2 ST/K000659/1 ST/K001418/1 ST/K502236/1 ST/J00474X/1 ATLAS Upgrades ST/K001264/1 ATLAS ST/K001302/1 ST/I00372X/1 GRIDPP ST/K001310/1 LHCb ST/K000705/1 ST/K001361/1 ATLAS ST/L001179/1 ATLAS Upgrade ST/J501074/1 ST/J005460/1 ST/J004944/1 ATLAS ST/L003325/1 ST/M007103/1 ATLAS Upgrades ST/L001195/1 ST/L000970/1 ST/K000713/1 ST/J002798/1 ST/H001093/2 PP/E002846/1 PP/E000347/1 PP/D002915/1 ST/K001310/1 ST/K001361/1 ST/M000664/1 ST/K001426/1 ATLAS ST/K001361/1 LHCb ST/K001310/1 ATLAS ST/I00372X/1 ST/K501840/1 GRIDPP ST/K501840/1 ST/K003658/1 GRIDPP ST/H001026/1 ST/H00100X/1 PP/E000487/1 ST/I006056/1 ATLAS Upgrade ST/M001474/1 ST/L001179/1 ATLAS Upgrades ST/M002306/1 ATLAS Upgrades ST/L006464/1 ST/K00140X/1 ST/K001337/1 ATLAS ST/H00100X/2 PP/E000355/1 ST/H00095X/2 ST/H001042/1 ST/I005803/1 GRIDPP ST/J00474X/1 ST/L000970/1 ATLAS Upgrade ST/M000761/1 ST/F007418/1 ST/I006080/1 ST/I505756/1 ST/J005525/1 ST/K003658/1 ST/M001733/1 ST/I005811/1 ST/H001026/2 GRIDPP PP/E000444/1 ST/G50228X/1 ST/J004928/1 ATLAS Upgrade ST/K001361/1 MINOS/MINOS+ ST/F00754X/1 ST/H001042/2 ST/J005533/1 ST/K001310/1 LHCb Upgrades ST/M003213/1 ST/L001209/1 ATLAS Upgrades ST/K50208X/1 ST/K00137X/1 ST/I000186/1 PP/E003087/1 ST/M002306/1 ST/M001431/1 ST/L00352X/1 ST/L001144/1 ST/K001248/1 ST/K001361/1 LHCb Upgrades ST/J500641/1 ST/J005487/1 ST/L001179/1 ST/M002071/1 ATLAS Upgrades ST/K001388/1 ST/J005576/1 ST/H001093/1
This paper presents the electron and photon energy calibration achieved with the ATLAS detector using about 25 fb−1 of LHC proton–proton collision data taken at centre-of-mass energies of s√=7 and 8 TeV. The reconstruction of electron and photon energies is optimised using multivariate algorithms. The response of the calorimeter layers is equalised in data and simulation, and the longitudinal profile of the electromagnetic showers is exploited to estimate the passive material in front of the calorimeter and reoptimise the detector simulation. After all corrections, the Z resonance is used to set the absolute energy scale. For electrons from Z decays, the achieved calibration is typically accurate to 0.05 % in most of the detector acceptance, rising to 0.2 % in regions with large amounts of passive material. The remaining inaccuracy is less than 0.2–1 % for electrons with a transverse energy of 10 GeV, and is on average 0.3 % for photons. The detector resolution is determined with a relative inaccuracy of less than 10 % for electrons and photons up to 60 GeV transverse energy, rising to 40 % for transverse energies above 500 GeV.